glauconite
noun
glau·co·nite
ˈglȯ-kə-ˌnīt 
: a mineral consisting of a dull green earthy iron potassium silicate occurring in greensand
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The greenish material is glauconite … an authigenic mineral that typically forms in marine shelf settings, thought to reflect very slow sedimentation rates.
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Brian Romans, WIRED, 20 Mar. 2008
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Brian Romans, WIRED, 20 Mar. 2008
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“Glauconite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/glauconite. Accessed 30 Dec. 2024.
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